Heya,
Nice to see another colorado user on the forum! I got my firebrick from Robinson bricks, and but now they are called general shale. http://www.generalshale.com/

The flat roof has been holding up quite well. I did put a piece of pond liner underneath in case it ever does leak. I am also very happy with my cast vent, it has kept the smoke stains off the front of the oven.

Things I would do differently:
1) Pay more attention to squaring up my entrance, it is a little off square and that makes the door a little tricky.

2) Build without forms (using the indespensible tool). It makes for a cleaner build inside the oven (no functional problems, just aesthetics.

The mortar (Heatstop) was harder to find. A lot of places had an airset mortar (premixed in a tub) but that is not the right stuff. You want a dry
mix, and heatstop was excellent.
Try Hillen Corp or Threewit Cooper

I am not expecting to get to the oven this fall, but hope to get started with the concrete work for sure. Unfortunately, I have about 100 trees that are shedding their leaves so most of my free time is committed.

Drake, Cnegrelli, another Coloradoian here and I'm getting ready to start my build. Foundation was poured last spring and in Mar I plan on starting with the base, hope to be done by early May. Been researching this stuff for almost a year. Currently in Colorado Springs.

Goal: 36" dome oven, encased. Idea I have is almost similar to Drake's.

I read one of the recent post on where to get the insultion items, which was one of my biggest questions so far, so thanks!

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